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Showing results for tags 'extinction'.
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Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes
FranzBernhard posted a topic in Fossil News
Some hints on the extinction of our cherished Meg: Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes (link to nature communications) Great white sharks may have contributed to megalodon extinction (link to science daily) Franz Bernhard- 1 reply
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At the very least, these are incredibly preserved fossils, but the view put forward is they are fossils preserved from the time of the asteroid impact. https://www.bbc.co.uk/news/science-environment-61013740
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Mammoths and other large animals survived in the north much longer than previously believed. New DNA research indicates that the climate, not humans, led to the demise of these large creatures, Norway Science, January, 2022 The open access paper is: Wang, Y., Pedersen, M.W., Alsos, I.G., De Sanctis, B., Racimo, F., Prohaska, A., Coissac, E., Owens, H.L., Merkel, M.K.F., Fernandez-Guerra, A. and Rouillard, A.,2021. Late Quaternary dynamics of Arctic biota from ancient environmental genomics. Nature, 600(7887), pp.86-92. It concludes t
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At Tanis, scientists studied the remains of three sturgeons and three paddlefish, using in particular high-resolution X-ray tomographic analysis from the Grenoble European Synchrotron (ESRF). They first established that the fish had indeed perished in the seiche episode, which was accompanied by a rain of glass spherules... https://www.cnn.com/2022/02/23/world/asteroid-dinosaur-extinction-spring-scn/index.html The research is described in a paper published Wednesday (Dec. 8) in the journal Scientific Reports.
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https://www.sciencedaily.com/releases/2021/08/210811113120.htm "over the last 20,000-50,000 years birds have undergone a major extinction event, inflicted chiefly by humans, which caused the disappearance of about 10%-20% of all avian species" "68% of the flightless bird species known to science became extinct"- 1 reply
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Mysterious event nearly wiped out sharks 19 million years ago By Yasemin Saplakoglu, Live Science, June 3, 2021 "It's unknown whether the ancient sharks died off in a single day, weeks, years or even thousands of years." The paper is: Elizabeth C. Sibert and Leah D. Rubin, 2021 An early Miocene extinction in pelagic sharks Science 04 Jun 2021: Vol. 372, Issue 6546, pp. 1105-1107 DOI: 10.1126/science.aaz3549 Yours, Paul H.
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Kauri trees mark magnetic flip and environmental crisis 42,000 years ago
Oxytropidoceras posted a topic in Fossil News
Ancient kauri trees capture last collapse of Earth’s magnetic field By Paul Voosen, Science, February 18, 2021 Ancient Trees Show When The Earth's Magnetic Field Last Flipped Out By Nell Greenfield-Boyce, Short Wave, NPR, February 18, 2021 Buried treasure - subfossil swamp kauri By Kate Evans, New Zealand Geographic Voosen, P., 2021, Kauri trees mark magnetic flip 42,000 years ago Science. vol. 371, Issue 6531, pp. 766 DOI: 10.1126/science.371.6531.766 The paper is: Cooper, A., Turney, C.S.M., Palmer, J. and others -
Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction
butchndad posted a topic in General Fossil Discussion
Burning Fossil Fuels Helped Drive Earth’s Most Massive Extinction https://www.nytimes.com/2020/11/18/science/extinction-global-warming.html?surface=home-discovery-vi-prg&fellback=false&req_id=829253552&algo=identity&imp_id=724592622&action=click&module=Science Technology&pgtype=Homepage -
Why did trilobites go extinct? By Donavyn Coffey, Live Science, November 2020 https://www.livescience.com/why-trilobites-went-extinct.html The open access paper is: Jonathan L. Payne, Alexandra V. Turchyn, Adina Paytan, Donald J. DePaolo, Daniel J. Lehrmann, Meiyi Yu, and Wei, Calcium isotope constraints on the end-Permian mass extinction. PNAS May 11, 2010 107 (19) 8543-8548 https://www.pnas.org/content/107/19/8543 A totally unrelated article is: The role of cat eye narrowing in cat-human communication by El
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Film on the meteor-strike that killed the dinosaurs
pachy-pleuro-whatnot-odon posted a topic in Questions & Answers
Hi everyone, Last year we visited a dinosaur show (I believe something like "DinoExpo") in our area in the Alsace (France), where they screened a film about the meteor-strike that killed the dinosaurs. It was spoken in French (though could of course have been voiced-over) and I hadn't seen it before. However, my wife, who normally isn't overly interested in anything dinosaur liked it a lot, to the extent of asking me afterwards whether I could find it so she could finish watching it. As I don't know where to start on it, I thought I'd ask here... So, the documentary's m -
For Late Ordovician graptolites, a long decline before extinction
Oxytropidoceras posted a topic in Fossil News
For ancient deep-sea plankton, a long decline before extinction University of Buffalo, Press release by Charlotte Hsu Sheets, H.D., Mitchell, C.E., Melchin, M.J., Loxton, J., Štorch, P., Carlucci, K.L. and Hawkins, A.D., 2016. Graptolite community responses to global climate change and the Late Ordovician mass extinction. Proceedings of the National Academy of Sciences, 113(30), pp.8380-8385. Researchgate PDF for above paper Related publications Yours, Paul H. -
Exploding stars may have caused mass extinction on Earth, study shows, University of Illinois at Urbana-Champaign, August 18, 2020 "Killer cosmic rays from nearby supernovae could be the culprit behind at least one mass extinction event, researchers said, and finding certain radioactive isotopes in Earth's rock record could confirm this scenario." The open access paper is: Brian D. Fields, Adrian L. Melott, John Ellis, Adrienne F. Ertel, Brian J. Fry, Bruce S. Lieberman, Zhenghai Liu, Jesse A. Miller, Brian C. Thomas. Super
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Genome Study of Woolly Rhino Shows Stable Population Until 4500 Years Before Extinction
Scylla posted a topic in Fossil News
They sequenced 14 woolly rhino genomes and found that they co-existed with humans for thousands of years with stable population sizes. They then conclude that humans did not cause the extinction, but warming of the climate did. What if wooly rhino just tasted bad? Then humans wouldn't hunt them until the other megafauna were extinct. Or we invented barbeque sauce. Then they would disappear in a blink of an eye. Anyway here's the news article: https://phys.org/news/2020-08-ancient-genomes-woolly-rhinos-extinct.html- 1 reply
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Asteroid shower on the Earth-Moon system 800 million years ago
Oxytropidoceras posted a topic in Fossil News
Asteroid shower rained space rocks on Earth and the moon 800 million years ago By Charles Q. Choi, SpaceCom, July 21, 2020 Asteroid shower on the Earth-Moon system 800 million years ago revealed by lunar craters by Osaka University, PhysOrg, July 21, 2020 The open access paper is: Terada, K., Morota, T. & Kato, M. Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA. Nature Communications (2020). DOI: 10.1038/s41467-020-17115-6 Yours, Paul H.-
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Just found this about the Permian extinction/the great dying, earths greatest mass extinction. https://www.artsci.utoronto.ca/news/geochronologists-shed-light-earths-greatest-mass-extinction
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News article: https://www.miragenews.com/fossil-discoveries-reveal-cause-of-megafauna-extinction/ Open access article: https://www.nature.com/articles/s41467-020-15785-w
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Racki, G., 2020, Volcanism as a prime cause of mass extinctions: Retrospectives and perspectives, in Adatte, T., Bond, D.P.G., and Keller, G., eds., Mass Extinctions, Volcanism, and Impacts: New Developments: Geological Society of America Special Paper 544, p. 1–34 https://www.researchgate.net/publication/337951571_Volcanism_as_a_prime_cause_of_mass_extinctions_Retrospectives_and_perspectives https://www.researchgate.net/profile/Grzegorz_Racki Racki, G., Rakociński, M., Marynowski, L. and Wignall, P.B., 2018. Mercury enrichments and the Frasnian-Fa
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Is the Chicxulub impact still the favored explaination for the extinction?
aplomado posted a topic in Questions & Answers
I read "The Story of the Dinosaurs in 25 Discoveries" by Donald R. Prothero. The author states that paleontologists now mostly do not think that the Chicxulub metor impact killed off the non-avian dinosaurs, and that other explainations are preferred. He did not really explain this statement. That certainly was news to me! I am no professional though. What's the truth? -
The enormous and prehistoric Chinese Paddlefish is officially extinct
Oxytropidoceras posted a topic in Fossil News
One of World's Largest Freshwater Fish May Be First Official Extinction of 2020 By Stephanie Pappas, Live Science, January 07, 2020 https://www.livescience.com/chinese-paddlefish-extinct.html This enormous ancient fish is officially extinct By Eva Frederick, Science, Jan. 7, 2020 https://www.sciencemag.org/news/2020/01/enormous-ancient-fish-officially-extinct The paper is: Zhang, H., Jarić, I., Roberts, D.L., He, Y., Du, H., Wu, J., Wang, C. and Wei, Q., 2020. Extinction of one of the world's largest freshwater fishes: L- 5 replies
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Human impact on nature 'dates back millions of years' By Helen Briggs, BBC News, January 20, 2020 https://www.bbc.com/news/science-environment-51068816 The open access paper is: Faurby, S., Silvestro, D., Werdelin, L. and Antonelli, A., Brain expansion in early hominins predicts carnivore extinctions in East Africa. Ecology Letters. https://onlinelibrary.wiley.com/doi/abs/10.1111/ele.13451 https://www.ncbi.nlm.nih.gov/pubmed/31943670 Yours, Paul H.
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Somehow, I find this terribly sad. https://www.bbc.com/future/article/20200128-how-did-the-last-neanderthals-live
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Does anyone know of anywhere that sells anything from the Permian extinction layer? I have matrix/micro glass beads from the KT boundary layer, but I can’t find anything like that from the Permian/Triassic boundary layer, but I can’t imagine there just wouldn’t be anything for sale anywhere, so I was wondering if anyone could point me in the right direction. I’d be curious about remnants of any extinction, but I’m specifically interested in anything Permian extinction.
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Younger Dryas platinum anomaly reported from South Carolina - Open Access paper
Oxytropidoceras posted a topic in Fossil News
New evidence that an extraterrestrial collision 12,800 years ago triggered an abrupt climate change for Earth, the Conversation, October 22, 2019 https://theconversation.com/new-evidence-that-an-extraterrestrial-collision-12-800-years-ago-triggered-an-abrupt-climate-change-for-earth-118244 the paper is: Moore, C.R., M.J. Brooks, A.C. Goodyear, T.A. Ferguson, A.G. Perrotti, S. Mitra, A. Listecki, B. King, D.J. Mallinson, C.S. Lane, B. Shapiro, J. Knapp, A. West, D.L. Carlson, W. Wolbach, T.R. Them, S.M. Harris, and S. Pyne-O’Donne-
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DNA analysis suggests humans pushed cave bears to extinction (open access)
Oxytropidoceras posted a topic in Fossil News
Humans pushed cave bears to extinction, their DNA suggests Washington Post, By Ben Guarino, August 15 2019 https://www.washingtonpost.com/science/2019/08/15/humans-pushed-cave-bears-extinction-their-dna-suggests/ Gretzinger, J., Molak, M., Reiter, E., Pfrengle, S., Urban, C., Neukamm, J., Blant, M., Conard, N.J., Cupillard, C., Dimitrijević, V. and Drucker, D.G., 2019. Large-scale mitogenomic analysis of the phylogeography of the Late Pleistocene cave bear. Scientific reports, 9. (open access) https://www.nature.com/articles/s41598-019-47073-z- 2 replies
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What were the largest animals to survive the KT extinction?
aplomado posted a topic in Questions & Answers
What were the largest animals to survive the KT extinction?
